C语言读取配置文件

自从大学学完C之后，就再也没用过它了，

在网上找代码，七拼八凑之后，终于成形~~勉强能用，不喜勿喷，^_^！

int GetValue(const wchar_t *key, wchar_t *value)
{
    FILE* fpcfg = NULL;
    wchar_t var[256], val[256];//key,value
    wchar_t linebuf[1024];
    wchar_t* ptr1 = NULL;
    wchar_t* ptr2 = NULL;
    wchar_t* delimiter = NULL;
    int k = 0;

    assert(key != NULL && value != NULL);

    //testConfig.ini中的内容为：
    //key1 = value1
    //key2 = value2
    fpcfg = fopen("testConfig.ini", "rt");
    if(fpcfg == NULL)
    {
        return -1;
    }

    while(fgetws(linebuf, sizeof(linebuf), fpcfg) != NULL)
    {
        //ignore annotation line
        if(linebuf[0]=='#' || linebuf[0]==';')
        {
            continue;
        }

        //ignore empty line
        ptr1 = linebuf;
        while(*ptr1==0x20 || *ptr1=='\t')
            ptr1++;
        if(!*ptr1 || *ptr1=='\n')
        {
            continue;
        }
        //search "="
        ptr2 = ptr1;
        while(*ptr2 && *ptr2!='=')
        {
            ptr2++;
        }
        delimiter = *ptr2?ptr2:NULL;
        //if current line start with "=", continue next line
        if(!delimiter || delimiter==ptr1)
        {
            continue;
        }
        //*delimiter = '\0';
        ptr2 = delimiter-1;
        //ignore blank before "="
        while(*ptr2==0x20 || *ptr2=='\t')
        {    ptr2--;}
        //check key length
        k = ptr2-ptr1+1;
        if(k>(int)sizeof(var)-1)
        {
            //The key name is out of length."
            continue;
        }
        //save key name
        ptr2 = var;
        while(k--)
        {
            *ptr2++ = *ptr1++;
        }
        *ptr2 = '\0';

        //locate value's start point(may be '\0')
        ptr1 = delimiter+1;
        //ignore blank after "="
        while(*ptr1==0x20 || *ptr1=='\t')
        {
            ptr1++;
        }
        //set ptr2 point to line end
        ptr2 = linebuf;
        while(*ptr2)
        {ptr2++;}
        ptr2--;
        if(*ptr2=='\n')
        {
            *ptr2-- = '\0';
        }
        //ignore blank line end
        //if value is empty,ptr2 --> = , ptr1>ptr2
        while(*ptr2==0x20 || *ptr2=='\t' )
        {
            ptr2--;
        }
        //check value length
        k = ptr2-ptr1+1;
        if(k>(int)sizeof(val)-1)
        {
            //The value is out of length"
            continue;
        }
        //save value
        ptr2 = val;

        while(k-->0)
        {
            *ptr2++ = *ptr1++;
        }

        *ptr2 = '\0';

        if(wcsncmp(var,key, wcslen(var) > wcslen(key) ? wcslen(var) : wcslen(key))==0){
            wcsncpy(value,val, wcslen(val));
            return 0;
        }
    }
    fclose(fpcfg);
    fpcfg = NULL;

    return -1;
}

恩，再来个main方法测试下：

int _tmain(int argc, wchar_t* argv[])
{
    wchar_t value[256] = {0};

    wchar_t keyParam[256] = L"ip";
    wchar_t *temp = (wchar_t *)malloc(sizeof(wchar_t) * 256);

    if(temp != NULL){
        memset(temp, 0x00, sizeof(wchar_t) * 256);
    }else{
        return -1;
    }

    if(0 == GetValue(keyParam, temp)){
        wcsncpy(value, temp, wcslen(temp));
        wprintf(L"Found:  %s\n", value);
    }else{
        wprintf(L"Not Found!!\n");
    }

    if(temp != NULL)
    {
        free(temp);    
        temp = NULL;
    }
    return 0;
}

 

好吧，这确实是个很丑陋的版本，仅供自己留着备用。

点这里下载